化工进展 ›› 2021, Vol. 40 ›› Issue (S2): 315-321.DOI: 10.16085/j.issn.1000-6613.2021-0962

• 材料科学与技术 • 上一篇    下一篇

CO2在ZIF-8/乙二醇-2-甲基咪唑浆液中溶解能力理论分析

姚德松1(), 刘煌1(), 陈莉2, 李瑞景1, 王舰1   

  1. 1.油气藏地质及开发工程国家重点实验室,西南石油大学,四川 成都 610500
    2.胜利油田鲁明油气勘探开发 有限公司,山东 东营 257000
  • 收稿日期:2021-05-06 修回日期:2021-07-06 出版日期:2021-11-12 发布日期:2021-11-12
  • 通讯作者: 刘煌
  • 作者简介:姚德松(1999—),男,硕士研究生,研究方向为油气藏开发。E-mail:1938765506@qq.com
  • 基金资助:
    国家自然科学基金(21606184);四川省科技计划(2021YFQ0044)

Theoretical analysis of CO2 dissolution ability in ZIF-8/glycol-2-methylimidazole slurry

YAO Desong1(), LIU Huang1(), CHEN Li2, LI Ruijing1, WANG Jian1   

  1. 1.State Key Lab of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu 610500, Sichuan, China
    2.Shengli Oilfield Luming Oil-Gas Exploration & Development Limited Company, Dongying 257000, Shandong, China
  • Received:2021-05-06 Revised:2021-07-06 Online:2021-11-12 Published:2021-11-12
  • Contact: LIU Huang

摘要:

有效降低CO2排量实现碳中和是当前研究热点之一。ZIF-8/乙二醇-2-甲基咪唑浆液被发现不仅能高效地捕集CO2,同时能利用浆液良好的流动性实现一个碳捕集-浆液流动再生-浆液再利用的连续碳捕集过程。为了有效地掌握纯CO2气体在ZIF-8/乙二醇-2-甲基咪唑浆液中的溶解能力,本文首先测定了293.15K、303.15K和313.15K下CO2在干ZIF-8上的吸附量和在2-甲基咪唑-乙二醇溶液中的溶解性;然后基于Langmuir方程和CO2溶解机理进一步建立了相应吸附量和溶解度计算数学模型;最后综合考虑ZIF-8/乙二醇-2-甲基咪唑浆液中乙二醇和ZIF-8之间的共存特征和相互影响,建立了CO2在目标浆液中溶解吸收量计算数学关联式。所得研究结果对浆液法CO2技术的推广和后续流程模拟具有良好的指导作用和理论意义。

关键词: ZIF-8/乙二醇-2-甲基咪唑浆液, 二氧化碳, 溶解性, 模型, 二氧化碳捕集

Abstract:

Effectively reducing CO2 emissions to achieve carbon neutrality is one of the current research hotspots. Our recent research found that ZIF-8/glycol-2-methylimidazole slurry can not only capture CO2 from gas mixtures efficiently, but also make use of the good flow of the slurry, a continuous separation process of carbon capture-slurry regeneration-slurry reuse could be realized. In order to understand the solubility of pure CO2 gas in ZIF-8/glycol-2-methylimidazole slurry, in this work, first, the adsorption ability of CO2 in the dry ZIF-8 material and the solubility of it in the 2-methylimidazole-glycol solution at 293.15K, 303.15K and 313.15K and different pressures were measured. Meanwhile, based on the Langmuir equation and CO2 dissolution mechanism in 2-methylimidazole-glycol solution, the corresponding CO2 adsorption capacity and solubility calculation mathematical models were established. Finally, considering the coexistence characteristic and mutual influence of glycol and ZIF-8 in ZIF-8/glycol-2-methylimidazole slurry, a mathematical correlation equation for calculating the sorption amount of CO2 in the target slurry was proposed. The obtained research results have good theoretical guidance for the promotion of CO2 capture technology by using the ZIF-8 slurry and subsequent process simulation.

Key words: ZIF-8/glycol-2-methylimidazole slurry, carbon dioxide, solubility, model, CO2 capture

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